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Nanoparticle foaming agents for major gas fields in China
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XIONG Chunming,CAO Guangqiang,ZHANG Jianjun,LI Nan,XU Wenlong,WU Junwen,LI Jun,ZHANG Na
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Table 8 Comparison tests in same-block and same-well type of conventional and nano-particle foaming agents in Sulige gas field.
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| Conditions | Comparison item | Conventional
foaming agent | Nano-particle
foaming agent | Improve-
ment/% | Before
operation | Number of operation wells | 160 | 30 | | | Benchmark production/(104 m3?d-1) | 0.236 0 | 0.235 5 | | | Average tubing pressure/MPa | 1.241 3 | 1.284 4 | | | Average casing pressure/MPa | 10.57 | 10.54 | | After
operation | Effective rate/% | 74.79 | 89.83 | 15.04 | | Average single-well cumulative gas production increment/104 m3 | 13.202 | 29.820 | 125.87 | | Usage per 10,000 cubic meters of gas increased/L | 19.817 | 8.709 | -56.05 | | Number of operations per 10,000 cubic meters of gas increased | 1.549 | 0.600 | -61.26 |
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